I’m going to take a wild guess. They are preparing us for war and so they don’t want the people to see blood and guts and just how horrendous the injuries are as it might cause people to think about the reality of war. The shocking images would make people fear what war will do to their friends and family and then they will object and oppose the war mongering of the politicians.
They used actors to make being shot seem not so bad – your clothes stay clean and you are soon up and about again – so “Let’s have a war, it’s nothing to worry about”.
Why the lack of hard evidence? Why instead do we have videos of non-medical personnel incorrectly carrying non-wounded people?